Viola Systems Arctic IEC-104 User Manual page 36

RX window size (w)
Defines the maximum number of I format APDUs the Arctic may receive before sending
acknowledgement to the IEC-104 master.
IEC-104 RX windows size (w)
Type
Units
Value range
Note
I frames TX timeout (t1)
Defines the timeout in seconds the Arctic waits for acknowledgement from IEC-104 master after
sending last I format APDU or control frame (e.g. link test). If no acknowledgement is received
during the defined time the Arctic will close the network connection and the IEC-101 link.
IEC-104 I frames TX timeout (t1)
Type
Units
Value range
Note
I frames RX timeout (t2)
Defines the timeout in seconds from the last received I format APDU before sending
acknowledgement.
IEC-104 I frames RX timeout (t2)
Type
Units
Value range
Note
Arctic IEC-104 Gateway
Window size
Packets
1-20
The w should not exceed two-thirds of TX window size k.
The IEC-104 standard suggests w to be 8.
Timeout
Seconds
1-255
The t1 must be longer than the network round-trip-time. The
IEC-104 standard suggests 15 seconds.
Timeout
Seconds
1-255
The t2 must be smaller than t1. The IEC-104 standard
suggests 10 seconds.
36
User's Manual
Viola Systems Ltd.